EP2884483B1 - Appareil et procédé pour commander un écran d'affichage dans un dispositif électronique - Google Patents

Appareil et procédé pour commander un écran d'affichage dans un dispositif électronique Download PDF

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Publication number
EP2884483B1
EP2884483B1 EP14197455.0A EP14197455A EP2884483B1 EP 2884483 B1 EP2884483 B1 EP 2884483B1 EP 14197455 A EP14197455 A EP 14197455A EP 2884483 B1 EP2884483 B1 EP 2884483B1
Authority
EP
European Patent Office
Prior art keywords
clock
power
timer
supply
screen change
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP14197455.0A
Other languages
German (de)
English (en)
Other versions
EP2884483A1 (fr
Inventor
Minwoo Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP2884483A1 publication Critical patent/EP2884483A1/fr
Application granted granted Critical
Publication of EP2884483B1 publication Critical patent/EP2884483B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3265—Power saving in display device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/3237—Power saving characterised by the action undertaken by disabling clock generation or distribution
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/3287—Power saving characterised by the action undertaken by switching off individual functional units in the computer system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/08—Power processing, i.e. workload management for processors involved in display operations, such as CPUs or GPUs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Definitions

  • the present invention relates to an apparatus and a method for controlling transmission of display data to a display unit in an electronic device.
  • an electronic device supplies an operation power using a battery. Therefore, the electronic device uses various methods for reducing power consumption.
  • the display unit of the electronic device may include a Liquid Crystal Display (LCD) or a Light Emitting Diode (LED) device and shows a trend toward an increase in volume. As a result, there is a trend toward an increase in power consumption by a display unit of an electronic device. In order to solve this problem, the display unit is turned off to reduce the power consumption in an idle state where the display unit does not operate.
  • LCD Liquid Crystal Display
  • LED Light Emitting Diode
  • the electronic device may transmit display data to the display unit at a configured frame rate in order to display information of an executed application.
  • the electronic device uses the Display Clock/Power Gating technology in order to reduce the current consumption.
  • the Display Clock/Power Gating technology is a technology for reducing the current consumption by blocking, step by step, clocks and/or power to display blocks inside or outside a Central Processing Unit (CPU) of a portable terminal in a section having no screen update (User Interface (UI) change).
  • CPU Central Processing Unit
  • UI User Interface
  • Document WO 2013/090584 A1 discloses a display controller that has non-essential portions powered off for a portion of vertical blanking interval (VBI) periods to conserve power.
  • the portion takes into account overhead for housekeeping functions and memory latency for receiving a fist packet of pixels for a frame to be decoded during a next active period.
  • Gating circuitry may gate power to the non-essential portions starting at beginning of the VBI periods.
  • a latency predictor may predict the portion of the VBI periods by predicting the memory latency for a next VBI period and subtracting the predicted memory latency from the VBI period.
  • the memory latency for the next VBI period may be predicted by adding an average difference between successive actual memory latencies for a plurality of VBI periods to an actual memory latency for previous VBI period.
  • Document US 2013/0262896 A1 discloses a processor that includes an instruction register unit in which data of a plurality of instructions is fetched; an instruction decoder unit in which each of the plurality of instructions is translated; a logic unit including a functional circuit which is supplied with a clock signal and a power source voltage, supplied with a data signal including the translated data of the instructions, and operates in accordance with the supplied data of the instructions; a data analysis unit in which the translated data is analyzed so as to calculate a non-operating period of the Junctional circuit, and a control signal is generated; and a control unit which controls the supply of the clock signal or both the clock signal and the power source voltage to the functional circuit in accordance with the control signal.
  • An electronic device is required to be capable of processing display data having different frame rates according to executed applications. Therefore, in the case of using the Display Clock/Power Gating technology to reduce the current consumption, when the power is turned on from the power-off state in order to transmit display data to the display unit, the configuration time for transmission of data may be prolonged, thereby increasing the power consumption and delaying the display.
  • a screen display control method may include: a screen change operation, which includes, in response to a screen change request, outputting data of a screen to be changed, to a display unit and predicting a next screen change cycle; and an operation of switching into a power saving mode when there is no screen change request.
  • a screen display control method of an electronic device may include: an operation of supplying a clock and power to a display block at a preconfigured time point before screen change; an operation of, in response to a screen change request, outputting data of a screen to be changed, to a display unit and predicting a next screen change cycle; and an operation of switching into a power saving mode when there is no screen change request.
  • An electronic device may include: an event generation unit that generates a screen change event; a display unit that receives screen change data and changes a displayed screen; and a controller that, in response to a detected screen change event, outputs data of a screen to be changed, to the display unit, predicts a next screen change cycle, and switches into a power saving mode when there is no screen change request.
  • an electronic device In reducing power consumption of a battery using the clock/power gating technology, an electronic device according to various embodiments of the present disclosure can analyze screen change cycles according to executed applications and dynamically configure clock gating and/or power gating time, thereby minimizing the current consumption. Further, in the case where screen change occurs in the electronic device, the restarting of the display block is performed ahead of time using an event recognizable ahead of time. Therefore, it is possible to reduce the display delay time.
  • FIGURES 1 through 11 discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged electronic devices.
  • embodiments of the present disclosure will be described with reference to the accompanying drawings.
  • the present disclosure may have various modifications and embodiments and thus will be described in detail with reference to specific embodiments illustrated in the drawings. However, it should be understood that there is no intent to limit the present disclosure to the particular forms disclosed herein; rather, the present disclosure should be construed to cover all modifications, equivalents, and/or alternatives falling within the scope of the disclosure.
  • identical or similar reference numerals are used to designate identical or similar elements.
  • the expression “include” or “may include” refers to existence of a corresponding function, operation, or element, and does not limit one or more additional functions, operations, or elements. Also, as used herein, the terms “include” and/or “have” should be construed to denote a certain feature, number, step, operation, element, component or a combination thereof, and should not be construed to exclude the existence or possible addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.
  • the expression “or” includes any or all combinations of words enumerated together.
  • the expression “A or B” may include A, may include B, or may include both A and B.
  • expressions including ordinal numbers may modify various elements.
  • such elements are not limited by the above expressions.
  • the above expressions do not limit the sequence and/or importance of the corresponding elements.
  • the above expressions may be used merely for the purpose of distinguishing one element from the other elements.
  • a first user device and a second user device indicate different user devices although both of them are user devices.
  • a first element may be termed a second element, and similarly, a second element may be termed a first element without departing from the scope of the present disclosure.
  • An electronic device can be a device including a communication function.
  • the electronic device can include at least one of a smartphone, a tablet Personal Computer (PC), a mobile phone, a video phone, an electronic book (e-book) reader, a desktop PC, a laptop PC, a netbook computer, a Personal Digital Assistant (PDA), a Portable Multimedia Player (PMP), an MP3 player, a mobile medical appliance, a camera, and a wearable device (e.g. a Head-Mounted-Device (HMD) such as electronic glasses, electronic clothes, an electronic bracelet, an electronic necklace, an electronic appcessory, electronic tattoos, or a smartwatch).
  • a wearable device e.g. a Head-Mounted-Device (HMD) such as electronic glasses, electronic clothes, an electronic bracelet, an electronic necklace, an electronic appcessory, electronic tattoos, or a smartwatch.
  • HMD Head-Mounted-Device
  • an electronic device can be a smart home appliance with a communication function.
  • the smart home appliances can include at least one of, for example, televisions, digital video disk (DVD) players, audio players, refrigerators, air conditioners, cleaners, ovens, microwaves, washing machines, air purifiers, set-top boxes, TV boxes (e.g., HomeSyncTM of Samsung, Apple TVTM, or Google TVTM ), game consoles, electronic dictionaries, electronic keys, camcorders, or electronic frames.
  • DVD digital video disk
  • the electronic device can include at least one of various medical appliances (e.g., magnetic resonance angiography (MRA), magnetic resonance imaging (MRI), computed tomography (CT), and ultrasonic machines), navigation equipment, a global positioning system (GPS) receiver, an event data recorder (EDR), a flight data recorder (FDR), automotive infotainment device, electronic equipment for ships (e.g., ship navigation equipment and a gyrocompass), avionics, security equipment, a vehicle head unit, an industrial or home robot, an automatic teller machine (ATM) of a banking system, and a point of sales (POS) of a shop.
  • various medical appliances e.g., magnetic resonance angiography (MRA), magnetic resonance imaging (MRI), computed tomography (CT), and ultrasonic machines
  • GPS global positioning system
  • EDR event data recorder
  • FDR flight data recorder
  • automotive infotainment device e.g., avionics, security equipment, a vehicle head unit,
  • the electronic devices can include at least one of furniture or a part of a building/structure having a communication function, electronic boards, electronic signature receiving devices, projectors, or various measuring equipment (e.g., equipment for a water supply, an electricity, gases or radio waves).
  • the electronic device according to the present disclosure can be a combination of one or more of the aforementioned various devices.
  • the electronic device according to the present disclosure can be a flexible device. Further, it is obvious to those skilled in the art that the electronic device according to the present disclosure is not limited to the aforementioned devices.
  • the term "user” can indicate a person using an electronic device or a device (e.g. an artificial intelligence electronic device) using an electronic device.
  • the electronic device controls the transmission of display data by dynamically calculating various parameters necessary for the display clock/power gating when transmitting display data to a display unit.
  • the electronic device can predict a screen request cycle of a next frame by analyzing cycles of previous frames when screen change is requested. Further, the electronic device can predict the next state to be changed, by measuring time consumed at the time of actual clock and/or power application for the clock/power gating.
  • the electronic device can identify an additional event in order to accelerate the re-starting at the time of display clock/power gating. That is, the electronic device can perform task necessary for screen change by analyzing the screen change request according to a user input (key and touch), a user cycle of a 2D or 3D accelerator, a user cycle of a codec, and change of Dynamic Voltage Frequency Scaling (DVFS) ahead of time.
  • a user input key and touch
  • a user cycle of a 2D or 3D accelerator a user cycle of a codec
  • DVFS Dynamic Voltage Frequency Scaling
  • the display block is an internal configurative module of a controller for transmitting display data to the display unit and can include all of an element for generating and detecting a display event, an element for controlling gating of a clock and/or power, and an element for transmitting display data to an external display unit.
  • a display module can be used as the same term as the display block.
  • a clock timer is a timer for gating-controlling the clock and can be set to time T1.
  • the clock timer can be used as the same term as a T1 timer.
  • a power timer is a timer for gating-controlling the power and can be set to time T2.
  • the power timer can be used as the same term as a T2 timer.
  • the term "gating" refers to an operation of turning off the clock and/or power supply.
  • the gating control signal can be generated at a screen change request time point or a configured time point before screen change.
  • the event is registered in an event detection unit, and a gating controller determines whether there exists an event registered before the configured time from the screen change time point, and generates, in advance, a gating control signal when the event exists.
  • the gating time point can have different time values according to the states (clock/power on state, clock off/power on state, and clock/power off state) of the display block, and the gating control signal can be generated at different temporal positions according to the states.
  • FIG. 1 is a view for describing display clock/power gating
  • FIG. 2 is a view for describing an operation of reconfiguring a clock and power in a state where the display clock/power gating as shown in FIG. 1 is performed.
  • an electronic device using the display clock/power gating technology transmits display data to an external display unit while controlling the supply of clock and power to the display module (which will be mixedly used hereinafter with display block). That is, the display module can be disposed inside the controller, and can transmit the display data to an external display unit at the time of screen change.
  • the display block can have a state where both a clock and power are supplied, a state where only the power is supplied, and a state where neither of the clock and the power are supplied.
  • T1 is defined as time having no screen change for determining whether it is in the clock gating and T2 is defined as time having no screen change for determining whether it is in the clock gating in a state where the clock has been blocked. Therefore, when there is no screen change request during time T1 in a state where both the clock and the power are applied to the display block, the clock of the display block is blocked. Further, when there is no screen change request during time T2 after the clock is blocked, the power of the display can be blocked.
  • the electronic device transmits a changed image to an external display unit (e.g. LCD) when there is a screen change request as indicated by reference numeral 121, and then blocks the clock of the display block when there is no screen change until a predetermined time T1 passes as indicated by reference numeral 123 of FIG. 1 .
  • an external display unit e.g. LCD
  • T1 a predetermined time
  • the electronic device supplies a clock and then transmits a changed image to the LCD when there is a screen change request, and blocks the power of the display block when there is no screen change until a predetermined time T2 passes as indicated by reference numeral 125 of FIG. 1 .
  • the electronic device supplies a clock and power and then transmits a changed image to the LCD when there is a screen change request as indicated by reference numeral 127 of FIG. 1 . Further, when there is no screen change request, the electronic device can go into standby in the state where the clock and power have been blocked.
  • the electronic device blocks the clock of the display block when there is no screen change during T1 (50 msec). Thereafter, when there is no screen change during T2 (50 msec), the electronic device blocks the power of the display block. If there is a screen change request during the standby, the electronic device supplies power and transmits a changed image to the LCD.
  • T1 and T2 the time for entering the clock/power gating.
  • each of T1 and T2 is set as 50 msec for entry into the clock/power gating and screen update is requested every 105 msec.
  • the time in which the power gating has the maximum current consumption saving effect is about 5 msec, and additional switching operation and delay according to restarting are necessary every 105 msec. Therefore, more current for the CPU is consumed due to the switching operation according to the restarting.
  • the current consumption by the CPU increases to decrease the current consumption according to the power gating.
  • the current consumption may not be actually saved due to the increase in the use rate of the CPU.
  • the screen change request can be generated at various frame rates according to executed applications. Therefore, various screen change requests are generated when an application is executed in an electronic device. In this event, if times T1 and T2 are fixed, it can be impossible to reduce the current consumption in some situations.
  • Reference numeral 230 of FIG. 2 indicates examples of delay time D1 and D2 according to reconfiguration when a screen change is requested in the cases of the normal operation state (clock: ON and power: ON), the clock-blocked state (clock: OFF and power: ON), and the power-blocked state (clock: OFF and power: OFF).
  • the normal operation state clock: ON and power: ON
  • the clock-blocked state clock: OFF and power: ON
  • the power-blocked state clock: OFF and power: OFF.
  • the display block can transmit changed display data (e.g. image) to an external display unit (e.g. LCD) without delay.
  • the display block can transmit changed display data (e.g. image) to an external display unit (e.g. LCD) after passage of D1 due to the occurrence of delay time for clock reconfiguration.
  • the display block can transmit changed display data (e.g. image) to an external display unit (e.g. LCD) after passage of D2 due to the occurrence of time delay for reconfiguration of clock and power.
  • a clock and power are supplied to the display block to transmit display data to the display unit, and time T1 as indicated by reference numeral 171 and time T2 as indicated by reference numeral 173 can be dynamically configured.
  • times T1 and T2 can be configured by an average value of screen change cycles requested during previously configured frames.
  • the time for turning off the power and the clock as indicated by reference numeral 175 is prolonged and the power consumption can be thus greatly reduced.
  • the display block includes a 2D/3D GPU, an internal codec, and a user input (e.g. touch or key input) processing unit, by which screen change is requested.
  • times T1 and T2 are dynamically configured based on the screen change request cycle of previous frames. As a result, it is possible to predict the time point for a screen change request. Therefore, as indicated by reference numerals 210 of FIG.
  • a gate control signal for reconfiguring the display block as indicated by reference numerals 211, 213, and 215 according to the state of the display block before an actual screen change request is generated as indicated by reference numerals 211, 213, and 215.
  • the electronic device can generate the gating control signal at a time point adjacent to the screen change request time point as indicated by reference numerals 211 and 221. Further, when a screen change request is anticipated in a state where the clock is turned off (i.e.
  • the electronic device predicts the time in which the display block can reconfigure the clock and generates the gating control signal as indicated by reference numeral 213 before the screen change request time point as indicated by reference numeral 223. Further, when a screen change request is anticipated in a state where the clock and the power are turned off as indicated by reference numeral 275, the electronic device predicts the time in which the display block can reconfigure the clock and the power and generates the gating control signal as indicated by reference numeral 215 before the screen change request time point as indicated by reference numeral 225. In this event, the reconfiguration time is longest in the power off state and is shortest in the state where the clock and the power are supplied.
  • different time points for gating according to the states of the display block as indicated by 211 and 221, 213 and 223, and 215 and 225 can be used to reconfigure the clock and/or power of the display block.
  • the gating control signals can be generated ahead of time before the screen change requests as indicated by reference numerals 213 and 215 in consideration of the delay time D1 for clock reconfiguration as indicated by reference numeral 283 and the delay time D2 for reconfiguration of the clock and the power as indicated by reference numeral 285.
  • reference numeral 290 it is possible to reduce the delay of the display data actually transmitted to an external display unit as indicated by reference numerals 293 and 295.
  • FIG. 3 is a block diagram illustrating a construction of an electronic device according to an embodiment of the present disclosure.
  • FIG. 4 is a block diagram illustrating a construction of a display module of the electronic device.
  • the display module as shown in FIG. 4 can be an internal element in a controller.
  • the controller 300 can control general operations of the electronic device.
  • a storage unit 310 can include a program memory storing programs for controlling the operation of the electronic device and a data memory storing data generated during execution of the programs.
  • the power supply unit 340 can supply an operation power to the electronic device.
  • An event generation unit 330 can generate various data for screen display.
  • a display unit 320 can display data received under the control of the controller 300.
  • the controller 300 includes a display block, and the display block can generate display data at a frame rate configured according to an executed application and transmit the generated display data to the display unit 320.
  • FIG. 4 is a block diagram illustrating the internal configuration of the controller 300.
  • the event generation unit 330 can generate various events for changing the display data supplied to the display unit 320. As used herein, the events can include a key input, a sensor input, and change of display data in an executed application.
  • an event processor 440 processes the generated event and an event detection unit 410 detects the processed event.
  • a gating controller 400 determines whether an event registered in the event detection unit 410 has been generated, and controls a clock management unit 420 and a power management unit 430 to apply a clock and power to a display controller 450 when an event registered in the event detection unit 410 exists. Further, the gating controller 400 can measure and store the time spent in applying the clock and the power. Then, according to the supply of the clock and the power, the display controller 450 can generate display data corresponding to the detected event and output the display data to the display unit 320.
  • the screen change can have different frame rates according to processed events.
  • the change rate of a UI screen can have 60 frames per sec (fps) and a video can have 30 fps.
  • a screen displaying time can have a screen change cycle of 100 ms or 10 ms according to the screen displaying change of seconds or minutes.
  • the gating controller 400 can predict a screen change rate of a currently executed application and then calculate times T1 and T2 to enable screen change in the next frame.
  • the gating controller 400 can analyze the screen change cycles of previous frames to predict the next screen change cycle and thus calculate times T1 and T2. In calculating times T1 and T2, an average value is first obtained by giving weight values to screen change time points according to the order of screen change requests. Then, times T1 and T2 is calculated based on the obtained average value and the time measured at the time of applying the clock. Further, the gating controller 400 can set the timer to time T1. Thereafter, the gating controller 400 can control the clock management unit 420 and the power management unit 430 by using the set times T1 and T2.
  • the gating controller 400 can control the clock management unit 420 and the power management unit 430 to supply the clock and the power to the display controller 450. Thereafter, when the T1 timer expires, the gating controller 400 controls the clock management unit 420 to block the clock supplied to the display controller 450 and operates the T2 timer. In this state, the power supply is maintained. Thereafter, when the T2 timer expires, the gating controller 400 can control the power management unit 430 to block the power supplied to the display controller 450.
  • FIG. 5 is a flowchart illustrating a process for controlling screen change by an electronic device.
  • the controller 300 detects the request in operation 511, controls the clock management unit 420 and the power management unit 430 to supply a clock and power to the display controller 450 in operation 551, and controls the display controller 450 to transmit display data of a changed screen to the display unit 320.
  • the controller 300 can supply the clock and/or power according to the state at the time point of the screen change request. That is, when the display block is in a clock-on-and-power-on state, display data of a changed screen is transmitted to the display unit 320.
  • display data of a changed screen can be transmitted to the display unit 320 after the clock is turned on, and the time spent at the time of applying the clock can be measured and stored.
  • display data of a changed screen can be transmitted to the display unit 320 after both the clock and the power are turned on, and the time spent at the time of applying the clock and the power can be measured and stored.
  • the time spent at the time of applying the clock can be shorter than the time spent at the time of applying the clock and the power, and the reason why the time spent at the time of applying the clock and/or the power is to take the time into consideration when the T1 timer and the T2 timer are operated later.
  • the controller 300 can reconfigure times T1 and time T2 in operation 555. That is, in calculating times T1 and T2 in operation 555, the controller 300 first obtains an average value by giving weight values to screen change time points according to the order of screen change requests, and then calculates times T1 and T2 based on the obtained average value and the time measured at the time of applying the clock/power.
  • FIG. 6 is a flowchart illustrating a method for configuring time for controlling clock and power supply in an electronic device.
  • the controller 300 can obtain screen change request cycles of previous configured frames, apply preconfigured weight values to the obtained screen change request cycles of the frames, and then total up them. For example, let us assume that there are five configured frames and more weight values are applied to more recent frames. Then, the controller 300 can obtain screen change request cycles respectively requested in five previous frames, multiply the cycles by the weight values corresponding to them, respectively, and then total up the frame request cycles in the five frame sections having been multiplied by the weight values.
  • the controller 300 can obtain an average screen change cycle, Ave by averaging screen change request cycles in the five previous frame sections to which the summed weight values have been applied (that is, by dividing the sum of the frame request cycles of the previous frames, to which the weight values have been applied, by a value obtained by adding the sum of all weight values and the number of frames). Thereafter, the controller 300 can analyze a configured clock resume value R1, a power resume value R2, and the averaged screen change cycle, Ave in operation 615, and then calculate T1 and T2 according to a result of the analysis in operation 617.
  • the controller 300 can determine times T1 and T2 according to whether the Ave value has been changed (increased, reduced, or unchanged), and results of comparison between the Ave value and the R1 value and comparison between the Ave value and the R2 value.
  • the controller 300 After times T1 and time T2 are determined while the process as shown in FIG. 6 is performed, the controller 300 operates the T1 timer in operation 557. Further, when there is no screen change request, the controller 300 can detect it and analyze the value of the timer in operation 513. In this event, in the state where the T1 timer operates, when there is screen change request, the controller 300 can detect it in operation 515 and can control the clock management unit 420 and the power management unit 430 to supply the clock and the power to the display controller 450 in operation 517. Thereafter, when the T1 timer expires, the controller 300 can detect it in operation 519 and control the clock management unit 420 to block the clock supplied to the display controller 450 and operate the T2 timer in operation 523.
  • the display block is in a state where the supply of the clock thereto has been blocked and the power is supplied thereto.
  • the controller 300 can detect it in operation 525, and then control the clock management unit 420 and the power management unit 430 to turn off the clock supply and maintain the power supply.
  • the controller 300 can control the clock management unit 420 and the power management unit 430 to maintain the state where the supply of the clock and the power has been blocked.
  • FIG. 7 is a block diagram illustrating the construction of a portable terminal performing a clock/power gating operation.
  • FIG. 8 illustrates the construction of a display block for performing a display clock/power gating in a portable terminal.
  • the portable terminal can be one of various digital devices including a mobile phone, an MP3 terminal, a tablet PC, a computer, and a camera device.
  • the controller 300 controls general operations of the electronic device.
  • the controller 300 can supply a clock and power to the display block and then transmit data of a screen to be changed to the display unit, and can predict a screen change cycle of the next frame by analyzing screen change cycles of configured frames and then configure time for gating control of the clock and the power. Thereafter, the controller 300 operates the timer in the state where there is no screen change request. Further, when the timer for controlling the clock supply expires, the controller 300 can turn off the clock supply to the display block while maintaining the power supply thereto and operate the timer for controlling the power supply.
  • the controller 300 turns off the clock and power supply to the display block. Further, the controller 300 can generate an on-control signal for the clock and/or the power in consideration of the clock/power reconfiguration time according to the current state (of/off state of the power and/or clock) before the time point at which a next screen change request is expected.
  • a storage unit 310 can include a program memory for storing an operation program of the electronic device and a program according to an embodiment of the present invention and a data memory for storing processed information.
  • the display unit 320 can display data received under the control of the controller 200.
  • the display unit 320 can include a Liquid Crystal Display (LCD), a Light Emitting Diode (LED), or an Organic Light Emitting Diode (OLED) and can display the display data transmitted from the display block of the controller 300 at the screen change time point.
  • LCD Liquid Crystal Display
  • LED Light Emitting Diode
  • OLED Organic Light Emitting Diode
  • the input unit 750 can generate a command or data for the portable terminal.
  • the input unit 750 can be a touch panel.
  • the input unit 750 can detect the position (coordinate information) of an input touched on or hovering over a touch panel.
  • the input unit 750 can further a touch panel for detecting a touch input.
  • the display unit 320 and the input unit 750 can be configured as an integral touch screen.
  • the communication unit 760 can include a transmitter for up-converting the frequency of a transmitted signal and amplifying the power thereof and a receiver for low noise-amplifying a received signal and down-converting the frequency thereof. Further, the communication unit 760 can include a modulator and a demodulator. The modulator can modulate the transmitted signal and transfers the modulated signal to the transmitter and the demodulator can demodulate a signal received through the receiver. In this case, the modulator and the demodulator can use LTE, WCDMA, GSM, WIFI, WIMAX, NFC, or Bluetooth. In an embodiment of the present invention, it is assumed that the communication unit 760 includes communication units such as LTE, WIFI, Bluetooth, NFC and the like.
  • the sensor 770 can detect movement (action) of the portable terminal.
  • the sensor 770 can include an acceleration sensor, a geomagnetic sensor and/or gyro sensor and can detect tilting and/or rotation state of the portable terminal. In the following description, it is assumed that the movement (action) is tilting.
  • the camera 780 includes an image sensor and can detect an external image, convert the image to an electric signal and digital data, and then output the converted signal and data.
  • the camera 780 can include dual cameras. Then, a first camera can be mounted to the rear surface of the dual camera and a second camera can be mounted to a bezel area on the front surface thereof.
  • the first camera can include a high pixel image sensor having a larger number of pixels than the second camera.
  • the first camera and the second camera can be either independently or simultaneously operated under the control of the controller 300.
  • the input unit 750, the communication unit 760, the sensor 770, and the camera 780 can be included in the event generation unit 330 shown in FIG. 3 .
  • FIG. 8 is an internal block diagram illustrating the display block and the configuration for controlling the display block.
  • the event generation unit 330 can generate various events requiring execution of the screen change as described above.
  • the event generation unit 330 can include the input unit 750, the communication unit 760, the sensor 770, and the camera 780 and the event can be a key input, a sensor input, a communication, or a camera operation.
  • the event processor 440 can process the generated event and the event detection unit 410 can detect the processed event.
  • the event processor 440 can include a peripheral device (e.g.
  • the event processor 440 can be processor hardware and the controller 300 can have device software corresponding to the processor hardware.
  • Elements of the device software corresponding to the processor hardware can include a peripheral (e.g. key, touch, and sensor) driver, a Dynamic Voltage Frequency Scaling (DVFC) driver, a GPU driver, and a codec driver.
  • a peripheral e.g. key, touch, and sensor
  • DVFC Dynamic Voltage Frequency Scaling
  • the event detection unit 410 can detect the event and transfer the detected event to the clock/power gating controller. Then, the gating controller 400 can determine whether an event registered in the event detection unit 410 has been generated, and can control the Clock Management Unit (CMU) 420 and a Power Management Unit (PMU) 430 to apply a clock and power to a display controller 450 when an event registered in the event detection unit 410 exists.
  • the display controller 450 can include elements of processor hardware, a display control module 853 and a display physical control module 852, and elements of device driver software, a display control driver and display physical control driver.
  • the gating controller 400 can identify the current state (i.e. power-and-clock-on state, power-off-and-clock-on state, or power-and-clock-off state) of the display controller 450 before the screen change request occurs, calculate the clock/power reconfiguration time according to the identified state, and generate a gating signal based on the calculation ahead of time. Then, the clock management unit 420 and the power management unit 430 can supply the clock and the power to the display controller 420 to perform the reconfiguration operation ahead of time. Thereafter, in response to a screen change request, the display controller 450 in the state where the clock and the power have been reconfigured can transmit display data for screen change to the external display unit 320. Then, the display unit 320 can receive the display data and can display a changed screen with minimized reconfiguration time for the display block of the controller 300.
  • the current state i.e. power-and-clock-on state, power-off-and-clock-on state, or power-and-clock-off state
  • the screen change can have different frame rates according to processed events.
  • the change of UI screen can have 60 frames per sec (fps) and a video can have 30 fps.
  • a screen displaying time can have a screen change cycle of 100 ms or 10 ms according to the screen displaying change of seconds or minutes.
  • the gating controller 400 can predict a screen change rate of a currently executed application and then calculate times T1 and T2 to enable screen change in the next frame.
  • the gating controller 400 can analyze the screen change cycles of previous frames to predict the next screen change cycle and thus calculate times T1 and T2. In calculating times T1 and T2, an average value is first obtained by giving more weight values to screen change cycles of more recent frames among the screen change cycles of previous frames. Then, times T1 and T2 can be calculated based on the obtained average value and the time measured at the time of applying the clock. Further, the gating controller 400 can set the timer to time T1. Thereafter, the gating controller 400 can control the clock management unit 420 and the power management unit 430 by using the set times T1 and T2.
  • the gating controller 400 can control the clock management unit 420 and the power management unit 430 to supply the clock and the power to the display controller 450. Thereafter, when the T1 timer expires, the gating controller 400 can control the clock management unit 420 to block the clock supplied to the display controller 450 and operates the T2 timer. In this state, the power supply is maintained. Thereafter, when the T2 timer expires, the gating controller 400 can control the power management unit 430 to block the power supplied to the display controller 450.
  • FIG. 9 is a flowchart illustrating another method for controlling screen change in a display unit by an electronic device.
  • the method shown in FIG. 9 allows a control to apply power and clock to a display block of the controller 300 at a time point at which screen change is predicted ahead of time.
  • the electronic device can have the constructions as shown in FIGs. 7 and 8 .
  • FIG. 10 illustrates an example of a method for controlling gating of power and clock while performing the process as shown in FIG. 9
  • FIG. 11 illustrates another example of the method for controlling gating of power and clock while performing the process as shown in FIG. 9 .
  • the controller 300 can detect it in operation 913, can analyze the current state of the display block in operation 961, and then generate a gating control signal for supplying a clock and power. In this event, the controller 300 can know time required for reconfiguration of the power and the clock in a state where the power ahead of time and the clock of the display block have been turned off, and time required for reconfiguration of the clock in a state where the power is supplied to of the display block and the clock thereof has been turned off. That is, the controller 300 can measure, through experiments, time required for reconfiguration of the clock and/or the power in each state of the display block, so as to pre-store the time for the gating control.
  • the controller 300 can detect it while performing operation 961 and operation 963, control the power management unit 430 to supply the power to the display block in operation 965, and control the clock management unit 420 to supply the clock to the display block in operation 967. Further, if the display block is in a state where the clock thereof is off and the power thereof is on, the controller 300 can detect it while performing operation 961 and operation 963, and control the clock management unit 420 to supply the clock to the display block in operation 967. Further, if the display block is in a state where the clock and the power thereof are on, the controller 300 can detect it in operation 961 and maintain the state where the clock and the power are supplied to the display block.
  • the reconfiguration time in the state where the clock and the power of the display block are off need to be longer than the reconfiguration time in the state where only the clock of the display block is off, and such configuration time should be taken into consideration in controlling the clock and the power of the display block.
  • the time spent at the time of applying the clock and/or the power can be stored. The stored time can be taken into consideration in operating the T1 and T2 timers.
  • the controller 300 can detect it in operation 911, control the display block to transmit display data for changing the screen to the display unit 320 in operation 951, and calculate times T1 and T2 for determining the screen change time point for the next frame by analyzing the previous screen change cycles in operation 953. In this event, the calculation of times T1 and T2 can be performed through the process shown in FIG. 6 .
  • parameters are defined as shown in Table 2 below.
  • the controller 300 can obtain screen change request cycles of five previous frames, apply preconfigured weight values to the obtained screen change request cycles of the frames, and then total up them. Then, the controller 300 can obtain screen change request cycles respectively requested in five previous frames, multiply the cycles by the weight values corresponding to them, respectively, and then total up the frame request cycles in the five frame sections having been multiplied by the weight values. Thereafter, in operation 613, the controller 300 can obtain an average screen change cycle, Ave by averaging screen change request cycles in the five previous frame sections to which the summed weight values have been applied (that is, by dividing the sum of the frame request cycles of the previous frames, to which the weight values have been applied, by a value obtained by adding the sum of all weight values and the number of frames).
  • the controller 300 can analyze a configured clock resume value R1, a power resume value R2, and the averaged screen change cycle Ave in operation 615, and then calculate T1 and T2 according to a result of the analysis in operation 617.
  • the times T1 and T2 can be obtained by analyzing whether there is change in the Ave value (condition 1), the relation between the Ave value and the R1 value (condition 2) and the relation between the Ave value and the R2 value (condition 3).
  • the information for calculation of Ave in consideration of the weight values is not sufficient in frame sections F1 to F5, in which times T1 and T2 are determined as 10 ms and 50 ms, respectively, as indicated by reference numerals 1000 to 1004. Thereafter, if the screen change cycle of fame F6 is 100 ms, the controller 300 obtains 100 msec as the Ave value by multiplying corresponding weight values to the screen change cycles of frames F2 to F6 and then obtaining their average value. Thereafter, the controller 300 determines times T1 andT2 by analyzing Ave, R1, and R2. Times T1 andT2 in frames F1 to F10 can be determined through the analysis as shown in Table 3 below.
  • the controller 300 can configure times T1 and T2 as indicated by reference numerals 1000 to 1009 according to the analysis of Ave, R1, and R2 as shown in Table 3, and the supply of the clock and the power of the display block are controlled according to times T1 and T2 as indicated by reference numerals 1000 to 1009 to save the current consumption as indicated by reference numerals 1050 to 1059.
  • Times T1 and T2 in frames f1 to f7 can be determined through the analysis as shown in Table 4 below.
  • Table 4 Frame R1 R2 aAve Condition analysis T1 T2 f1 10ms 50ms 16 aAve increase, aAve ⁇ R1, Ave ⁇ R2 larger value between R1 and 1F time smaller value between R2 and Ave f2 10ms 50ms 38 aAve increase, aAve ⁇ R1, Ave ⁇ R2 larger value between R1 and 1F time R2 f3 10ms 50ms 47 aAve increase, aAve ⁇ R1, Ave ⁇ R2 larger value between R1 and 1F time R2 f4 10ms 50ms 53 aAve increase, ave ⁇ R1, ave ⁇ R2 larger value between R1 and 1F time R1 f5 10ms 50ms 58 aAve increase, aAve ⁇ R1, Ave ⁇ R2 larger value between R1 and 1F time R1 f6
  • the controller 300 can configure times T1 and T2 as indicated by reference numerals 1111 to 1117 according to the analysis of Ave, R1, and R2 as shown in Table 4, and the supply of the clock and the power of the display block are controlled according to times T1 and T2 as indicated by reference numerals 1111 to 1117 to save the current consumption as indicated by reference numerals 1161 to 1067.
  • the controller 300 can determine times T1 and T2 while performing the process as shown in FIG. 6 in operation 953, and operate the T1 timer in operation 971. Thereafter, when there is no screen change request in the state where the T1 timer operates, the controller can analyze the value of the operated timer. In this event, in the state where the T1 timer operates, when there is screen change request, the controller 300 can detect it in operation 915 and can control the clock management unit 420 and the power management unit 430 to supply the clock and the power to the display controller 450 in operation 941.
  • the controller 300 can detect it in operation 915, control the clock management unit 420 to block the clock supplied to the display controller 450 in operation 921, and operate the T2 timer in operation 923.
  • the display block is in a state where the supply of the clock thereto has been blocked and the power is supplied thereto.
  • the controller 300 can detect it in operation 941, and control the clock management unit 420 and the power management unit 430 to block the clock supply and allow the power supply.
  • the controller 300 may detect it in operation 915 and control the clock management unit 420 and the power management unit 430 to maintain the interruption of the supply of the clock and the power.
  • a controller in an electronic device can dynamically calculate parameters required for display clock/power gating when transmitting data for screen change to a display unit.
  • the clock/power gating method it is possible to predict a next screen change request cycle by analyzing previous screen change request cycles and predict the next state to which the current state is to be changed, by measuring the time consumed when applying the actual clock and/or power. Since times T1 and T2 are dynamically calculated based on learned/analyzed screen change cycles as described above, the present invention can reduce the current consumption in the entire scenario of the electronic device. Further, it is possible to perform the operations necessary for screen change ahead of time (i.e.

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Claims (13)

  1. Procédé de commande d'un dispositif électronique comprenant une unité d'affichage (320), le procédé étant effectué par un organe de commande (300) du dispositif électronique et comprenant :
    une opération de changement d'écran comprenant, en réponse à une demande de changement d'écran pour mettre à jour le contenu affiché sur l'unité d'affichage,
    l'alimentation d'une horloge et d'une énergie à un module d'affichage (450) de l'organe de commande (300),
    la sortie de données d'un écran à mettre à jour par le module d'affichage (450) à l'unité d'affichage,
    la détermination d'une durée de trame d'une trame suivante par l'analyse de durées de trames de trames précédentes ;
    la configuration d'une minuterie d'horloge qui commande un point dans le temps pour interrompre une alimentation de l'horloge au module d'affichage (450) et d'une minuterie d'énergie qui commande un point dans le temps pour interrompre une alimentation de l'énergie au module d'affichage (450) sur la base de la durée de trame déterminée de la trame suivante, et
    l'actionnement de la minuterie d'horloge ; et
    une opération de commutation dans un mode d'économie d'énergie lorsqu'aucune demande de changement d'écran n'est reçue comprenant :
    en réponse à une expiration de la minuterie d'horloge, l'actionnement de la minuterie d'énergie et l'interruption d'une alimentation de l'horloge au module d'affichage, et
    en réponse à une expiration de la minuterie d'énergie, l'interruption d'une alimentation d'énergie au module d'affichage.
  2. Procédé selon la revendication 1, dans lequel une opération de détermination de la durée de trame d'une trame suivante comprend :
    l'obtention d'une valeur moyenne de la durée de trame par l'application de valeurs de poids préconfigurées à des durées de trames générées dans un nombre préconfiguré de trames précédentes au temps de la configuration de la minuterie d'horloge et de la minuterie d'énergie et l'analyse de la valeur moyenne pour déterminer des valeurs de la minuterie d'horloge et de la minuterie d'énergie correspondant à la durée de trame déterminée de la trame suivante.
  3. Procédé selon la revendication 2, dans lequel l'opération de détermination de valeurs de la minuterie d'horloge et de la minuterie d'énergie comprend :
    l'analyse d'une augmentation ou d'une diminution de la valeur moyenne par la comparaison de la valeur moyenne et d'un temps de reprise d'horloge, et la détermination des valeurs de la minuterie d'horloge et de la minuterie d'énergie sur la base d'un résultat de la comparaison entre la valeur moyenne et le temps de reprise d'horloge.
  4. Procédé selon la revendication 1, dans lequel l'opération d'alimentation de l'horloge ou de l'horloge et de l'énergie au module d'affichage en réponse à une demande de changement d'écran comprend :
    l'analyse d'un état d'interruption du module d'affichage ;
    lorsque l'analyse indique un résultat selon lequel l'énergie est alimentée dans un état dans lequel l'alimentation de l'horloge est interrompue, l'alimentation d'une horloge tout en maintenant l'alimentation d'énergie ; et
    lorsque l'analyse indique un résultat selon lequel l'alimentation de l'énergie et de l'horloge est interrompue, l'alimentation d'une énergie puis l'alimentation d'une horloge.
  5. Procédé selon la revendication 1, dans lequel l'opération de commutation comprend :
    l'alimentation d'une horloge et d'une énergie au module d'affichage lorsque la minuterie d'horloge fonctionne sans la demande de changement d'écran ;
    l'arrêt de l'alimentation de l'horloge au module d'affichage, le maintien de l'alimentation de l'énergie à celui-ci, et l'actionnement de la minuterie d'énergie lorsque la minuterie d'horloge expire sans la demande de changement d'écran ;
    l'arrêt de l'alimentation de l'horloge au module d'affichage et le maintien de l'alimentation de l'énergie à celui-ci lorsque la minuterie d'énergie fonctionne sans la demande de changement d'écran ; et l'arrêt de l'alimentation de l'horloge et de l'énergie au module d'affichage lorsque la minuterie d'énergie expire sans la demande de changement d'écran.
  6. Dispositif électronique comprenant :
    une unité d'affichage (320) ;
    une unité de génération d'événement (330) configurée pour la génération d'un événement de changement d'écran pour mettre à jour le contenu affiché sur l'unité d'affichage (320),
    dans lequel l'unité d'affichage (320) est configurée pour recevoir des données de changement d'écran et pour mettre à jour le contenu affiché sur l'unité d'affichage (320) ; et
    un organe de commande (300) configuré pour effectuer :
    en réponse à un événement de changement d'écran détecté, l'alimentation d'une horloge et d'une énergie à un module d'affichage (450) de l'organe de commande (300),
    la sortie de données d'un écran à changer, à l'unité d'affichage (320),
    la détermination d'une durée de trame d'une trame suivante par l'analyse de durées de trames de trames précédentes ;
    la configuration d'une minuterie d'horloge qui commande un point dans le temps pour interrompre une alimentation de l'horloge au module d'affichage (450) et d'une minuterie d'énergie qui commande un point dans le temps pour interrompre une alimentation de l'énergie au module d'affichage (450) sur la base de la durée de trame déterminée de la trame suivante, et
    l'actionnement de la minuterie d'horloge ;
    et lorsqu'il n'y a pas de demande de changement d'écran :
    en réponse à une expiration de la minuterie d'horloge, l'actionnement de la minuterie d'énergie et l'interruption d'une alimentation de l'horloge au module d'affichage, et
    en réponse à une expiration de la minuterie d'énergie, l'interruption d'une alimentation d'énergie au module d'affichage.
  7. Dispositif électronique selon la revendication 6, dans lequel l'organe de commande (300) comprend :
    une unité de détection d'événement (410) configurée pour la détection d'un événement généré dans l'unité de génération d'événement (330) ;
    une unité de gestion d'horloge (420) configurée pour l'alimentation de l'horloge ;
    une unité de gestion d'énergie (430) configurée pour l'alimentation d'une énergie ;
    un organe de commande d'affichage (450) configuré pour la transmission de données d'affichage pour un changement d'écran à l'unité d'affichage (320) ; et
    un organe de commande de grille (400) configuré pour effectuer :
    la commande à l'unité de gestion d'horloge (420) et à l'unité de gestion d'énergie (430) d'effectuer l'alimentation d'une horloge et d'une énergie à l'organe de commande d'affichage (450) en réponse à une demande de changement d'écran lorsqu'un événement est détecté,
    la détermination de la durée de trame d'une trame suivante et la configuration de la minuterie d'horloge et de la minuterie d'énergie,
    l'analyse des minuteries lorsqu'il n'y a pas de demande de changement d'écran,
    la commande à l'unité de gestion d'horloge (420) d'interrompre une alimentation de l'horloge à l'organe de commande d'affichage (450) à l'expiration de la minuterie d'horloge, et
    la commande à l'unité de gestion d'énergie (430) d'interrompre une alimentation de l'énergie à l'organe de commande d'affichage (320) à l'expiration de la minuterie d'énergie.
  8. Dispositif électronique selon la revendication 7, dans lequel l'organe de commande de grille (400) est configuré pour commander à l'unité de gestion d'horloge (420) et à l'unité de gestion d'énergie (430), à un point dans le temps préconfiguré avant un changement d'écran, d'effectuer l'alimentation de l'horloge et de l'énergie à l'organe de commande d'affichage (450) pour délivrer des données de sortie de changement d'écran sans retard à un point dans le temps de demande de changement d'écran, configurer la minuterie d'horloge et la minuterie d'énergie sur la base de la durée de trame déterminée d'une trame suivante, et actionner la minuterie d'horloge.
  9. Dispositif électronique selon la revendication 7, dans lequel l'unité de génération d'événement (330) comprend au moins l'une de :
    une unité d'entrée configurée pour détecter une entrée tactile et une entrée de touche ;
    au moins un capteur configuré pour détecter l'état du dispositif électronique ;
    une unité de communication configurée pour communiquer avec des dispositifs externes et/ou des systèmes externes ; et
    une caméra configurée pour acquérir une image externe.
  10. Dispositif électronique selon la revendication 7, dans lequel l'organe de commande de grille (400) est configuré pour l'obtention d'une valeur moyenne de la durée de trame par l'application de valeurs de poids prédéterminées à des durées de trames générées dans un nombre préconfiguré de trames précédentes au temps de la configuration de la minuterie d'horloge et de la minuterie d'énergie et l'analyse de la valeur moyenne pour déterminer des valeurs de la minuterie d'horloge et de la minuterie d'énergie correspondant à la durée de trame d'écran déterminée de la trame suivante.
  11. Dispositif électronique selon la revendication 10, dans lequel l'organe de commande de grille (400) est configuré pour l'analyse d'une augmentation ou d'une diminution de la valeur moyenne par la comparaison de la valeur moyenne et d'un temps de reprise d'horloge, et la détermination des valeurs de la minuterie d'horloge et de la minuterie d'énergie sur la base d'un résultat de la comparaison entre la valeur moyenne et le temps de reprise d'horloge.
  12. Dispositif électronique selon la revendication 10, dans lequel l'organe de commande de grille (400) est configuré pour, en réponse à une demande de changement d'écran, l'inspection d'un état de l'organe de commande d'affichage et l'alimentation de l'horloge tout en maintenant l'alimentation d'énergie lorsque l'énergie est alimentée dans un état dans lequel l'alimentation de l'horloge est interrompue, et l'alimentation de l'énergie puis l'alimentation de l'horloge lorsque l'organe de commande d'affichage est dans un état dans lequel l'alimentation de l'énergie et de l'horloge est interrompue.
  13. Dispositif électronique selon la revendication 10, dans lequel l'organe de commande de grille (400) est configuré pour :
    l'alimentation de l'horloge et de l'énergie au module d'affichage lorsque la minuterie d'horloge fonctionne sans la demande de changement d'écran ;
    l'arrêt de l'alimentation de l'horloge au module d'affichage, le maintien de l'alimentation de l'énergie à celui-ci, et l'actionnement de la minuterie d'énergie lorsque la minuterie d'horloge expire sans la demande de changement d'écran ;
    l'arrêt de l'alimentation de l'horloge au module d'affichage et le maintien de l'alimentation de l'énergie à celui-ci lorsque la minuterie d'énergie fonctionne sans la demande de changement d'écran ; et l'arrêt de l'alimentation de l'horloge et de l'énergie au module d'affichage lorsque la minuterie d'énergie expire sans la demande de changement d'écran.
EP14197455.0A 2013-12-13 2014-12-11 Appareil et procédé pour commander un écran d'affichage dans un dispositif électronique Not-in-force EP2884483B1 (fr)

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KR1020130155897A KR102195518B1 (ko) 2013-12-13 2013-12-13 전자장치의 화면 표시 제어장치 및 방법

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EP2884483B1 true EP2884483B1 (fr) 2017-08-16

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US20150169038A1 (en) 2015-06-18
EP2884483A1 (fr) 2015-06-17
US9625977B2 (en) 2017-04-18
KR102195518B1 (ko) 2020-12-29
KR20150069625A (ko) 2015-06-24

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